few concrete questions for a slab

[sweetk30]

1st question .

i have a outside patio area and its a solid slab no major problems just older non smooth finish anymore . we are redoing the house color and figure why not coat it a color close to 1 on the house .

is there any good diy level products i can put on that are uv/sun fade proof or real resistant to .

2nd question . 1st pic .

my shop has a big crack in the entry way for the main bay . whats best to fill this in with ? hydro cement / self leveler / what ?

3rd question . 2nd pic .

in the shop there is a section the floor dropped years ago and has not moved anymore . today i ground down the big overhang lip to a more smoothed out ramp . i still have a decent amount of uneven area . is there a product i can pit in there to level it out and also have it stay in place or do i need to pin it in place like rebar but use a few tapcon screws for this size area over rebar so when i put the product down its locked in place with the bond and around the tapcons .

thanks fo all your help guys

 

[massarogi]

I just repaired a ton of cracks in my concrete before doing the floor, I just used hydraulic cement to patch it and then grinded it down flush.